In this resurvey of herpetofauna in Khao Soi Dao between January and June 2008, 51 species of reptiles and 25 species of amphibians were found with three new records of snakes: Pareas hamptoni, Amphiesma khasiense and Ovophis convictus. The presence of some endemic reptiles and amphibians in the region was confirmed: Lycodon cardamomensis and Quasipaa fasciculispina. The diversity of herpetofauna in the study area compared to that in the Cardamom Ranges indicates that these areas are continuous territories.